Engine Mechanical Specifications. Cadillac CTS 2006

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2006 🢒 CTS 🢒 Preface 🢒 Cautions and Notices 🢒 Engine Mechanical Specifications

Application	Specification
Application	Metric	English
General
Engine Type	V-6
Displacement	2.8 Liter	171 cu in
RPO	LP1
VIN	T
Bore	89 mm	3.5039 in
Stroke	74.8 mm	2.9449 in
Compression Ratio	10.0:1
Cranking RPM - at 40° C (104°F)	80 RPM
Idle Speed	600 A/C Off - 700 A/C On
Firing Order	1-2-3-4-5-6
Spark Plug Gap	1.1 mm	0.0433 in
Block
Crankshaft Main Bearing Bore Diameter	72.867-72.881 mm	2.8688-2.8693 in
Cylinder Bore Diameter	88.992-89.008 mm	3.5036-3.5042 in
Cylinder Bore Out-of-Round - Production Max.	0.013 mm	0.0005 in
Camshaft
Camshaft Bearing Inside Diameter - Front Number 1	35.000-35.020 mm	1.3779-1.3787 in
Camshaft Bearing Inside Diameter - Middle and Rear Number 2-4	27.000-27.020 mm	1.0630-1.0638 in
Camshaft End Play	0.045-0.215 mm	0.0018-0.0085 in
Camshaft Journal Diameter - Front Number 1	34.936-34.960 mm	1.3754-1.3764 in
Camshaft Journal Diameter - Middle and Rear Number 2-4	26.936-26.960 mm	1.0605-1.0614 in
Camshaft Journal Out-of-Round	0.006 mm	0.0002 in
Camshaft Journal to Bore Clearance	0.040-0.084 mm	0.0016-0.0033 in
Camshaft Lobe Duration - Exhaust @ 0.150 mm (0.0059 in) Lift	252 degrees
Camshaft Lobe Duration - Intake @ 0.150 mm (0.0059 in) Lift	237 degrees
Camshaft Lobe Lift - Exhaust	42.456-42.756 mm	1.6715-1.6833 in
Camshaft Lobe Lift - Intake	42.385-42.685 mm	1.6687-1.6805 in
Camshaft Lobe Overlap @ 0.150 mm (0.0059 in) Lift	0 degrees
Camshaft Runout - Front and Rear Number 1 and 4	0.025 mm	0.0010 in
Camshaft Runout - Middle 2 and 3	0.050 mm	0.0020 in
Camshaft Timing @ 0.15 mm (0.0059 in) Lift
Valve Opens - Exhaust	-283 degrees BTDC
Valve Opens - Intake	14 degrees ATDC
Centerline - Exhaust	118 degrees ATDC
Centerline - Intake	132 degrees ATDC
Valve Closes - Exhaust	9 degrees ATDC
Valve Closes - Intake	251 degrees ATDC
Valve Lift - Exhaust	10.8 mm	0.4252 in
Valve Lift - Intake	10.8 mm	0.4252 in
Cooling System
Thermostat Full Open Temperature	95°C	203°F
Connecting Rod
Connecting Rod Bearing Clearance	0.010-0.070 mm	0.0004-0.0028 in
Connecting Rod Bore Diameter - Bearing End	59.620-59.636 mm	2.3472-2.3479 in
Connecting Rod Bore Diameter - Pin End	24.007-24.021 mm	0.9452-0.9457 in
Connecting Rod Length - Center to Center	155.8 mm	6.1338 in
Connecting Rod Side Clearance	0.095-0.355 mm	0.0037-0.0140 in
Connecting Rod Width - Bearing End
Production	21.775 mm	0.8573 in
Service	21.770-21.780 mm	0.8571-0.8575 in
Connecting Rod Width - Pin End
Production	26.000 mm	1.0236 in
Service	25.950-26.050 mm	1.0217-1.0256 in
Crankshaft
Connecting Rod Journal Diameter	55.992-56.008 mm	2.2044-2.2050 in
Connecting Rod Journal Out-of-Round	0.005 mm	0.0002 in
Connecting Rod Journal Taper	0.005 mm	0.0002 in
Connecting Rod Journal Width
Production	22.000 mm	0.8661 in
Service	21.920-22.080 mm	0.8630-0.8693 in
Crankshaft End Play	0.100-0.330 mm	0.0039-0.0130 in
Crankshaft Main Bearing Clearance	0.010-0.060 mm	0.0004-0.0024 in
Crankshaft Main Journal Diameter	68.000 mm	2.6772 in
Crankshaft Main Journal Out-of-Round	0.005 mm	0.0002 in
Crankshaft Main Journal Taper	0.005 mm	0.0002 in
Crankshaft Main Journal Thrust Wall
Runout	0.000-0.040 mm	0.0000-0.0016 in
Square	0.000-0.010 mm	0.0000-0.0004 in
Crankshaft Main Journal Width, #2, 4
Production	24.000 mm	0.9449 in
Service	23.900-24.100 mm	0.9409-0.9488 in
Crankshaft Main Journal Width, #3
Production	24.400 mm	0.9606 in
Service	24.360-24.440 mm	0.9591-0.9622 in
Crankshaft Pilot Bearing Bore Diameter	20.965-20.995 mm	0.8254-0.8266 in
Crankshaft Rear Flange Runout	0.025 mm	0.0010 in
Crankshaft Reluctor Ring Runout - Maximum	2.000 mm	0.0787 in
Crankshaft Runout	0.030 mm	0.0012 in
Crankshaft Thrust Bearing Clearance	0.076-0.305 mm	0.0030-0.0120 in
Crankshaft Thrust Surface - Height Diameter	95.000 mm	3.7401 in
Crankshaft Thrust Surface Runout	0.040 mm	0.0016 in
Cylinder Head
Combustion Chamber Volume	49.4 cc	3.015 cu in
Valve Guide Bore - Exhaust	6.000-6.020 mm	0.2362-0.2370 in
Valve Guide Bore - Intake	6.000-6.020 mm	0.2362-0.2370 in
Valve Guide Installed Height	14.050-14.550 mm	0.5531-0.5728 in
Valve Lifter Bore Diameter	12.008-12.030 mm	0.4728-0.4736 in
Lubrication System
Oil Capacity - With or Without Oil Filter Change	5.7 Liters	6 Quarts
Oil Pressure - Minimum @ Idle	69 kPa	10 psi
Oil Pressure - Minimum @ 2,000 RPM	138 kPa	20 psi
Piston Cooling Jet Valve Opening Pressure	1.7-2.3 bar	25-33 psi
Oil Pump
Gear Diameter - Outer	87.095-87.175 mm	3.4289-3.4321 in
Gear Pocket - Depth	15.565-15.600 mm	0.6128-0.6142 in
Gear Pocket - Diameter	87.275-87.325 mm	3.4360-3.4380 in
Gear Thickness - Drive/Driven	15.511-15.536 mm	0.6107-0.6117 in
Gear-to-Cover Clearance - Drive/Driven	0.030-0.085 mm	0.0012-0.0033 in
Gear-to-Housing Clearance - Drive/Driven	0.100-0.230 mm	0.0039-0.0091 in
Inner Gear Tip Clearance	0.075-0.180 mm	0.0030-0.0071 in
Crankshaft Clearance to Housing	0.040-0.130 mm	0.0016-0.0051 in
Inner Gerotor Hub Diameter	53.310-53.335 mm	2.0988-2.0998 in
Housing Hub Diameter	53.380-53.420 mm	2.1016-2.1031 in
Inner Gerotor Hub Clearance to Housing	0.045-0.110 mm	0.0018-0.0043 in
Piston Rings
Piston Ring End Gap
First Compression Ring	0.150-0.300 mm	0.0059-0.0118 in
Second Compression Ring	0.280-0.480 mm	0.0110-0.0189 in
Oil Control Ring	0.150-0.600 mm	0.0059-0.0236 in
Piston Ring to Groove Clearance
First Compression Ring	0.030-0.065 mm	0.0012-0.0026 in
Second Compression Ring	0.015-0.060 mm	0.0006-0.0024 in
Oil Control Ring	0.030-0.170 mm	0.0012-0.0669 in
Piston Ring Thickness
First Compression Ring	1.175-1.190 mm	0.0463-0.0469 in
Second Compression Ring	1.470-1.495 mm	0.0579-0.0589 in
Oil Control Ring	2.360-2.480 mm	0.0929-0.0976 in
Pistons and Pins
Piston
Piston Diameter	88.956-88.974 mm	3.5022-3.5029 in
Piston Pin Bore Diameter	24.007-24.012 mm	0.9452-0.9454 in
Piston Ring Groove Width - First Compression Ring	1.220-1.240 mm	0.0480-0.0488 in
Piston Ring Groove Width - Second Compression Ring	1.510-1.530 mm	0.0595-0.0602 in
Piston Ring Groove Width - Oil Control Ring	2.510-2.530 mm	0.0988-0.0996 in
Piston to Bore Clearance	0.022-0.032 mm	0.0008-0.0013 in
Pin
Piston Pin Clearance to Connecting Rod Bore	0.007-0.024 mm	0.0003-0.0010 in
Piston Pin Clearance to Piston Pin Bore	0.007-0.015 mm	0.0003-0.0006 in
Piston Pin Diameter	23.997-24.000 mm	0.9448-0.9449 in
Piston Pin Length	65.24-65.74 mm	2.5685-2.5882 in
Valve System
Valves
Valve Face Angle	44.25 degrees
Valve Face Runout	0.038 mm	0.0015 in
Valve Face Width - Exhaust	2.750 mm	0.1083 in
Valve Face Width - Intake	2.180 mm	0.0858 in
Valve Head Diameter - Exhaust	30.470-30.730 mm	1.1996-1.2098 in
Valve Head Diameter - Intake	35.03-35.29 mm	1.3791-1.3894 in
Valve Installed Height	35.23-36.69 mm	1.3870-1.4445 in
Valve Length - Exhaust	97.11 mm	3.8232 in
Valve Length - Intake	101.23 mm	3.9854 in
Valve Seat Angle - Seating Surface	45 degrees
Valve Seat Angle - Relief Surface	30 degrees
Valve Seat Angle - Undercut Surface	60 degrees
Valve Seat Roundness- Maximum	0.025 mm	0.0010 in
Valve Seat Runout - Maximum	0.080 mm	0.0032 in
Valve Seat Width - Exhaust Seating Surface	1.400-1.800 mm	0.0551-0.0709 in
Valve Seat Width - Exhaust Relief Surface	0.700-0.900 mm	0.0276-0.0354 in
Valve Seat Width - Intake Seating Surface	1.000-1.400 mm	0.0394-0.0551 in
Valve Seat Width - Intake Relief Surface	0.500-0.700 mm	0.0197-0.0276 in
Valve Stem Diameter - Exhaust	5.945-5.965 mm	0.2341-0.2348 in
Valve Stem Diameter - Intake	5.955-5.975 mm	0.2344-0.2352 in
Valve Stem-to-Guide Clearance - Exhaust	0.035-0.075 mm	0.0014-0.0030 in
Valve Stem-to-Guide Clearance - Intake	0.025-0.065 mm	0.0010-0.0026 in
Valve Lifters - Stationary Hydraulic Lifter Assembly (SHLA)
Valve Lifter (SHLA) Diameter	11.989-12.000 mm	0.4720-0.4724 in
Valve Lifter (SHLA)-to-Bore Clearance	0.037-0.041 mm	0.0015-0.0016 in
Rocker Arms
Valve Rocker Arm Ratio	1.68 to 1
Valve Rocker Arm Roller Diameter	17.740-17.800 mm	0.6987-0.7008 in
Valve Springs
Valve Spring Coil Thickness	3.250 x 3.900 mm	0.1280 x 0.1535 in
Valve Spring Diameter - Inside Top	12.090-12.590 mm	0.4760-0.4957 in
Valve Spring Diameter - Outside Top	20.140 mm	0.7929 in
Valve Spring Diameter - Inside Bottom	17.950-18.450 mm	0.7067-0.7264 in
Valve Spring Diameter - Outside Bottom	26.000 mm	1.0236 in
Valve Spring Free Length	42.050-44.850 mm	1.6555-1.7657 in
Valve Spring Installed Height - Closed	35.000 mm	1.3779 in
Valve Spring Installed Height - Open	24.000 mm	0.9449 in
Valve Spring Load - Closed	247-273 N	56-61 lb
Valve Spring Load - Open	598-662 N	134-149 lb
Valve Spring Total Number of Coils	7.1